Engineering topics
Publications and source records attributed to Mcdonald, J. K..
The effect of an ammonia environment on the spectral reflectance of certain optical surfaces in the vacuum ultraviolet region was studied. In particular, the optical surfaces in the space shuttle were considered. Scans made of sample beams showed no change in the relative intensities before or after exposure to ammonia. Ammonia showed no effect on the Al/MgF2 mirror reflectance in the vacuum ultraviolet.
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A spectrometer was specifically designed and developed to observe grating spectra over a range of incidence angles from normal to almost grazing incidence. A unique scanning and focusing mechanism is utilized to keep the exit slit on the Rowland circle. Polarization effects in the vacuum were investigated, and efficiency measurements and spectral scans were made simultaneously with the spectrometer. Results of measurements are given. Applications of the spectrometer to the space program and to the study of contamination on optical surfaces are indicated.
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Abstract missing.
Description of the properties of a carboxypeptidase, termed 'catheptic carboxypeptidase C,' and a dipeptidase, termed 'Ser-Met dipeptidase.' Both were found in highly purified DAP I from either beef spleen or rat liver. Methods are described for the removal or selective inactivation of these contaminating enzymes.
Dipeptidyl aminopeptidase I /cathepsin C/ properties, subcellular localization and polypeptide degradation in rat liver and bovine spleen and pituitary glands
Dipeptides separation and identification by column and paper chromatography for elution times prediction and sequence studies
Refutation of Sylven-Snellman report of catalysis of benzoylarginine beta-naphthylamide and leucine beta-naphthylamide hydrolysis by beef spleen cathespin B
Chloride and sulfhydryl activators in glucagol degradation and secretion by purified rat liver dipeptidyl aminopeptidase I /Cathepsin C/
Substrate specificity of cathepsin C derived from rat liver, describing polymeric structure and behavior as acidic protein
Purification and substrate specificity of dipeptidyl arylamidase II from extracts of bovine anterior pituitary glands, noting peptidase and dipeptide esterase activities
Dipeptidyl arylamidase I of bovine pituitary tissue and chloride and sulfhydryl activation of seryltyrosyl-beta-naphthylamide hydrolysis
Dipeptidyl-beta-naphthylamidase activated by chloride in extracts of rat and bovine anterior pituitary glands